linux/include/asm-xtensa, branch v2.6.25

kvm: provide kvm.h for all architecture: fixes headers_install

2008-04-02T22:28:18Z

Currently include/linux/kvm.h is not considered by make headers_install, because Kbuild cannot handle " unifdef-$(CONFIG_FOO) += foo.h. This problem was introduced by commit fb56dbb31c4738a3918db81fd24da732ce3b4ae6 Author: Avi Kivity Date: Sun Dec 2 10:50:06 2007 +0200 KVM: Export include/linux/kvm.h only if $ARCH actually supports KVM Currently, make headers_check barfs due to , which includes, not existing. Rather than add a zillion s, export kvm. only if the arch actually supports it. Signed-off-by: Avi Kivity which makes this an 2.6.25 regression. One way of solving the issue is to enhance Kbuild, but Avi and David conviced me, that changing headers_install is not the way to go. This patch changes the definition for linux/kvm.h to unifdef-y. If unifdef-y is used for linux/kvm.h "make headers_check" will fail on all architectures without asm/kvm.h. Therefore, this patch also provides asm/kvm.h on all architectures. Signed-off-by: Christian Borntraeger Acked-by: Avi Kivity Cc: Sam Ravnborg Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[XTENSA] Allow debugger to modify the WINDOWBASE register.

2008-02-14T01:45:36Z

For the 'return' command, GDB needs to adjust WINDOWBASE. In case WB is different from 0, we need to rotate the window register file and update WINDOWSTART and WMASK. This patch also removes some ret|= statements for __get_user/__put_user as the address range was alrady checked a couple of lines earlier. Signed-off-by: Chris Zankel

[XTENSA] Fix cache flush macro for D$/I$ aliasing/non-aliasing

2008-02-14T01:43:26Z

For configurations that have aliasing in the data cache but not in the instruction cache, we don't need to flush the instruction cache. Thus, we didn't define the macros to flush the instruction cache. Some cache-flush functions, howerver, were using those macros. Signed-off-by: Chris Zankel

[XTENSA] Exclude thread-global registers from the xtregs structures.

2008-02-14T01:43:00Z

Signed-off-by: Chris Zankel

[XTENSA] Add support for configurable registers and coprocessors

2008-02-14T01:41:43Z

The Xtensa architecture allows to define custom instructions and registers. Registers that are bound to a coprocessor are only accessible if the corresponding enable bit is set, which allows to implement a 'lazy' context switch mechanism. Other registers needs to be saved and restore at the time of the context switch or during interrupt handling. This patch adds support for these additional states: - save and restore registers that are used by the compiler upon interrupt entry and exit. - context switch additional registers unbound to any coprocessor - 'lazy' context switch of registers bound to a coprocessor - ptrace interface to provide access to additional registers - update configuration files in include/asm-xtensa/variant-fsf Signed-off-by: Chris Zankel

[XTENSA] Clean up stat structs.

2008-02-14T01:27:03Z

Avoid using typedefs for stat fields. Make stat64.st_blocks an unsigned long long to avoid endian-specific padding with 32-bit values. Clean up signed vs. unsigned and int vs. long types to be consistent with other uses of these values. Signed-off-by: Bob Wilson Signed-off-by: Chris Zankel

[XTENSA] Add volatile keyword to asm statements accessing counter registers

2008-02-14T01:24:47Z

The compiler get's sometimes to smart and doesn't reread the counter registers and the kernel doesn't schedule until the counter wraps around. Signed-off-by: Chris Zankel

[XTENSA] Fix modules for non-exec processor configurations

2008-02-14T01:23:26Z

We need to use vmalloc_exec for module loading. Also remove the definitions MODULE_START and MODULE_END, which wasn't used, and increase the VMALLOC memory range accordingly. Signed-off-by: Chris Zankel

[XTENSA] Add missing cast in elf.h ELF_CORE_COPY_REGS()

2008-02-14T01:22:49Z

Avoids compiler warning. Signed-off-by: Marc Gauthier

[XTENSA] Remove oldmask from sigcontext and fix register flush

2008-02-14T01:12:15Z

Remove oldmask from the sigcontext structure. Also update wmask and windowstart when we flush the AR registers to stack. Signed-off-by: Chris Zankel